Jake Peavy walked off the mound in obvious pain after throwing a pitch in the second inning last night, heading to the dugout before the trainer even got to him.
He’s been diagnosed with a strained right latissimus dorsi muscle, which is located under the shoulder and described by my medical sources (read: Wikipedia) as “the broadest muscle of the back.”
Peavy is scheduled to be examined further today, but certainly doesn’t sound like someone who expects to avoid the disabled list.

I don’t feel very good at all right now. That’s all I can tell you. I knew there was no way I was throwing another pitch. Something we felt a little bit the last start, treated it, but tonight just something where we weren’t able to pitch.

Or as Ozzie Guillen put it: “I’m pretty sure right now he’s going to be on the DL.”
For a much more amusing look at Peavy’s injury, check out this artist’s rendering by Chicago Sun-Times beat writer Joe Cowley.